Halogenation, sulphonation, Friedel-Craft's reaction of haloarenes is an example of:

Options

A. addition reaction of benzene
B. electrophilic substitution reaction benzene
C. nucleophilic substitution reaction benzene
D. elimination reaction of benzene

Explanation

To solve the question regarding the halogenation, sulphonation, and Friedel-Craft's reaction of haloarenes, we need to identify the type of reaction these processes represent.

### Step-by-Step Solution:

1. **Understanding the Reactions**:
- Halogenation involves the introduction of halogen atoms (like Cl, Br) into the aromatic ring.
- Sulphonation involves the introduction of a sulfonyl group (SO3H) into the aromatic ring.
- Friedel-Craft's reactions (alkylation and acylation) involve the introduction of alkyl or acyl groups into the aromatic ring.

2. **Identifying the Nature of the Aromatic Ring**:
- The aromatic ring (like benzene or haloarenes) is electron-rich due to the delocalized π-electrons. This makes it susceptible to electrophilic attack.

3. **Recognizing the Type of Reaction**:
- All these reactions (halogenation, sulphonation, and Friedel-Craft's reactions) involve the substitution of hydrogen atoms on the aromatic ring by electrophiles.
- In these reactions, the electrophile attacks the electron-rich aromatic system, leading to the substitution of hydrogen atoms.

4. **Conclusion**:
- Since all these reactions involve the substitution of an electrophile for a hydrogen atom on the aromatic ring, they are classified as **Electrophilic Substitution Reactions**.

### Final Answer:
The halogenation, sulphonation, and Friedel-Craft's reactions of haloarenes are examples of **Electrophilic Substitution Reactions**.